Kavach 4.0 commissioned on 738 route km on the Delhi–Mumbai and Delhi–Howrah routes
The Railway Ministry said on 5 December 2025 that Kavach 4.0 has been commissioned on 738 route km: 633 Rkm on the Palwal–Mathura–Nagda section of the Delhi–Mumbai route and 105 Rkm on the Howrah–Bardhaman section of the Delhi–Howrah route.
Summary
Kavach 4.0, India's indigenous Automatic Train Protection (ATP) system, has been commissioned on 738 route km, the Railway Ministry said on 5 December 2025: 633 Rkm on the Palwal–Mathura–Nagda section of the Delhi–Mumbai route and 105 Rkm on the Howrah–Bardhaman section of the Delhi–Howrah route. Kavach automatically applies brakes if the loco pilot fails to keep within speed limits, needs SIL-4 safety certification, and was adopted as the National ATP system in July 2020; RDSO approved the version 4.0 specification on 16 July 2024. Trackside Kavach work has been taken up on 15,512 Rkm covering the Golden Quadrilateral, Golden Diagonal, high-density network and other identified sections.
Key facts
- Date
- 5 December 2025
- Commissioned
- 738 Rkm of Kavach 4.0
- Delhi–Mumbai route
- Palwal–Mathura–Nagda, 633 Rkm
- Delhi–Howrah route
- Howrah–Bardhaman, 105 Rkm
- Safety level
- SIL-4
- National ATP
- Adopted July 2020
- Version 4.0
- Approved by RDSO on 16 July 2024
- Work taken up
- 15,512 Rkm
Practice MCQs 3 questions
On how many route km had Kavach 4.0 been commissioned as of 5 December 2025?
Show answer
Correct answer: C — 738
PIB 2199327: Kavach 4.0 commissioned on 738 Rkm: Palwal–Mathura–Nagda (633 Rkm) and Howrah–Bardhaman (105 Rkm).
Which section of the Delhi–Howrah route has Kavach 4.0 been commissioned on?
Show answer
Correct answer: A — Howrah–Bardhaman
PIB 2199327: Kavach 4.0 is commissioned on the Howrah–Bardhaman section (105 Rkm) of the Delhi–Howrah route.
Consider the following statements about Kavach: 1. It was adopted as the National Automatic Train Protection system in July 2020. 2. It requires Safety Integrity Level 4 (SIL-4) certification. 3. RDSO approved the Kavach version 4.0 specification in 2024. Which of the statements given above is/are correct?
Show answer
Correct answer: D — 1, 2 and 3
PIB 2199327: adopted as National ATP in July 2020; requires SIL-4 certification; RDSO approved specification 4.0 on 16 July 2024.